Home / 85,370.20-128,055.30-38,714.20

Finding the Fourth Proportional to 85,370.20, 128,055.30 and 38,714.20

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Solution

The fourth proportional to 85,370.20, 128,055.30 and 38,714.20 is: 58,071.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,370.20 : 128,055.30 = 38,714.20 : x
  2. Step 2: Convert to fraction form
    85,370.20/128,055.30 = 38,714.20/x
  3. Step 3: Cross multiply
    85,370.20x = 128,055.30 × 38,714.20
  4. Step 4: Simplify right side
    85,370.20x = 4,957,558,495.26
  5. Step 5: Solve for x
    x = 4,957,558,495.26/85,370.20
  6. Step 6: Final answer
    x = 58,071.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.